28645833639 has 8 divisors (see below), whose sum is σ = 38199219952. Its totient is φ = 19094834880.

The previous prime is 28645833583. The next prime is 28645833647. The reversal of 28645833639 is 93633854682.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28645833639 - 2⁷ = 28645833511 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28645833649) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 568702 + ... + 617019.

It is an arithmetic number, because the mean of its divisors is an integer number (4774902494).

Almost surely, 2^28645833639 is an apocalyptic number.

28645833639 is a deficient number, since it is larger than the sum of its proper divisors (9553386313).

28645833639 is a wasteful number, since it uses less digits than its factorization.

28645833639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1193777.

The product of its digits is 22394880, while the sum is 57.

The spelling of 28645833639 in words is "twenty-eight billion, six hundred forty-five million, eight hundred thirty-three thousand, six hundred thirty-nine".